package com.mccree.server;

import com.mccree.handler.NettyChatServerHandler;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.string.StringDecoder;
import io.netty.handler.codec.string.StringEncoder;

public class NettyChatServer {

    private final int port;

    public NettyChatServer(int port) {
        this.port = port;
    }

    public static void main(String[] args) throws InterruptedException {
        new NettyChatServer(7000).run();
    }

    public void run() throws InterruptedException {
        EventLoopGroup bossGroup = new NioEventLoopGroup(1);
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {

            ServerBootstrap serverBootstrap = new ServerBootstrap();

            serverBootstrap.group(bossGroup,workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG,128)
                    .childOption(ChannelOption.SO_KEEPALIVE,true)
                    .childHandler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel ch) throws Exception {
                            //获取到pipeline
                            ChannelPipeline pipeline = ch.pipeline();
                            //向pipeline加入加入解码器
                            pipeline.addLast("decoder",new StringDecoder());
                            //向pipeline加入编码器
                            pipeline.addLast("encoder",new StringEncoder());
                            //加入自定义的handler
                            pipeline.addLast(new NettyChatServerHandler());
                        }
                    });

            System.out.println("netty服务器启动");
            ChannelFuture channelFuture = serverBootstrap.bind(port).sync();

            //监听关闭
            channelFuture.channel().closeFuture().sync();

        }finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }

    }
}
